This statement has to be one of the most lazy, thoughtless cliches in all of sports fandom. Just because fans want their team to improve or because they criticize moves or the lack thereof does not make those fans "spoiled." It makes them passionate. That's the definition of being a fan.
Straw Man, with a False Dichotomy thrown in for good measure. If your idea of "thoughtful" is simply combining logical fallacies, I am proud to be considered "thoughtless".
But this is kind of the problem with being merely passionate--it tends to overcloud rational thought.